linux-kernel - [PATCH 2/2] proc: switch inode number allocation to IDA

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Message-ID: <20080726072137.GB5115@martell.zuzino.mipt.ru>
Date:	Sat, 26 Jul 2008 11:21:37 +0400
From:	Alexey Dobriyan <adobriyan@...il.com>
To:	akpm@...l.org
Cc:	linux-kernel@...r.kernel.org
Subject: [PATCH 2/2] proc: switch inode number allocation to IDA

proc doesn't use "associate pointer with id" feature of IDR, so switch
to IDA.

NOTE, NOTE, NOTE:
	Do not apply if release_inode_number() still mantions MAX_ID_MASK!

Signed-off-by: Alexey Dobriyan <adobriyan@...il.com>
---

 fs/proc/generic.c |   10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

--- a/fs/proc/generic.c
+++ b/fs/proc/generic.c
@@ -300,7 +300,7 @@ out:
 	return rtn;
 }
 
-static DEFINE_IDR(proc_inum_idr);
+static DEFINE_IDA(proc_inum_ida);
 static DEFINE_SPINLOCK(proc_inum_lock); /* protects the above */
 
 #define PROC_DYNAMIC_FIRST 0xF0000000U
@@ -315,11 +315,11 @@ static unsigned int get_inode_number(void)
 	int error;
 
 retry:
-	if (idr_pre_get(&proc_inum_idr, GFP_KERNEL) == 0)
+	if (ida_pre_get(&proc_inum_ida, GFP_KERNEL) == 0)
 		return 0;
 
 	spin_lock(&proc_inum_lock);
-	error = idr_get_new(&proc_inum_idr, NULL, &i);
+	error = ida_get_new(&proc_inum_ida, &i);
 	spin_unlock(&proc_inum_lock);
 	if (error == -EAGAIN)
 		goto retry;
@@ -328,7 +328,7 @@ retry:
 
 	if (i > UINT_MAX - PROC_DYNAMIC_FIRST) {
 		spin_lock(&proc_inum_lock);
-		idr_remove(&proc_inum_idr, i);
+		ida_remove(&proc_inum_ida, i);
 		spin_unlock(&proc_inum_lock);
 	}
 	return PROC_DYNAMIC_FIRST + i;
@@ -337,7 +337,7 @@ retry:
 static void release_inode_number(unsigned int inum)
 {
 	spin_lock(&proc_inum_lock);
-	idr_remove(&proc_inum_idr, inum - PROC_DYNAMIC_FIRST);
+	ida_remove(&proc_inum_ida, inum - PROC_DYNAMIC_FIRST);
 	spin_unlock(&proc_inum_lock);
 }
 
-- 
1.5.4.5


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